A calculator that takes into account portfolio rebalancing?(1) People do in fact periodically rebalance their portfolios. (2) The question never mentioned continuous rebalancing -- you did. The question stated a rebalancing frequency of once per year. (3) What rebalancing approach would you suggest instead? It isn't clear. None/never?

Do I pay withholding tax on a US company trading on TSEYour example doesn't work because Cenovus is a Canadian company based in Alberta and not an American company. You might instead cite a U.S. headquartered company that also happens to trade on the TSX. You may perhaps be confusing the idea of "U.S. company" with one that is listed on an American exchange. Not the same thing.